摘要
文章阐述了相山矿田北部习惯上称之为次火山岩型铀矿床的地质特征,从区域成矿物质迁移过程和演化历史分析的角度,结合稀土元素地球化学特征研究,对成矿物质来源进行了探讨;利用氢、氧同位素组成推断了成矿溶液来源。笔者认为,"次火山岩型"铀矿床在时间上、空间上和成因上与花岗斑岩密切相关,可以将其称之为斑岩型铀矿床。成矿作用是斑岩成岩作用及岩浆期后热液作用演化的产物,降温、减压、流体混合作用促使成矿流体中的矿质浓缩和沉淀。文章最后对矿田内斑岩型铀矿的深入找矿提出了建议。
This paper describes the characteristics of so-called subvolcanic type uranium deposits in northern Xiangshan orefield. Combining with the study of REE geochemical characteristics, The source of metallogenic substances is discussed in the view of migration process of regional metallogenic substances and historic evolution analysis. The source of rnetallogenic solution is deduced from H and O isotopic compositions. ＂Sub-volcanic＂ type uranium deposits are considered to have close temporal, spatial and genetic relation with granite porphyry. So they can be called porphyry-type uranium deposits, which are objective products of porphyry diagenesis action and hydrothermal solution evolution of post magmatism. Temperature decline, Pressure decrease and fluid mix promote the concentration and precipitation of mineral materials in metallogenic fluid. Finally, the paper has put forward suggestions for further exploration of DorDhvrv-tvDe uranium dew,sits.
出处
《铀矿地质》
CAS
CSCD
2008年第6期321-326,346,共7页
Uranium Geology
关键词
斑岩型铀矿
成矿物质来源
成矿溶液来源
铀成矿作用
porphyry-type uranium deposit
metallogenic substance source
metallogenic solution source
metallogenesis
